Re: [time-nuts] 1PPS to 32.768 khz

[planophore]

Lee,

Another option might be something like this:

http://qrp-labs.com/progrock.html

it is a standalone ATTiny based device which uses a plug in Si5351a
synthesizer. Output frequencies from as low as 3.515 khz to a 100+ MHz
can programmed and can be GPS disciplined suing a GPS' PPS. There are
some limits on the PPS (i.e. very narrow will work).

Granted, phase noise and jitter in this example are a wildcard and I
couldn't comment on that with respect to your application.

The Si5351a synthesizer board uses a simple 27MHz crystal but can
replaced with a standard SMD 27MHz oscillator or TCXO. Once "burned"
in, can be very stable all on it's own and may be sufficient your needs.

cheers, Graham

On 10/19/2016, "Lee - N2LEE via time-nuts"  wrote:

>First let me say this is first time I have posted to the group so go easy on 
>me. :)
>Secondly I want everyone to know that you guys make me feel so NORMAL for
>wanting to use and understand accurate timing devices.
>
>I thought there was something seriously wrong with me now I know there are 
>others
>affected with the same disease. hehe
>
>Now my questions.
>
>1. Does anyone know of a device that will take a 1PPS GPS timing signal and 
>generate a 32.768 kHz sine wave output ?
>I have big digital clock that uses an 8 bit micro processor and an external 
>32.768 crystal. Obviously the external crystal is
>awful for accuracy.
>
>I have searched every where using as many search terms as I can think of and 
>can’t believe there is not a device that performs
>this function.
>
>I have found a couple of Epson RTC chips that might come close that 1pps but I 
>don’t think that corrects the 32khz just the clock time.
>
>2. 10 Mhz Freq Standard
>I am not in the same league as the majority of the list members and just 
>starting to dabble in GPSDO stuff.
>I have tried to find a thunderbolt as a starting device but it appears those 
>are either dried up or people want too much money.
>
>I wanted to get the opinion of anyone who has tried the Leo Bodnar GPSDO ?
>For the money it appears to offer a beginner a lot of features.
>
>Thanks and reading the daily digest of what you guys are working on.
>I have a feeling if I am not careful you guys could cost me a lot of money. 
>hehe
>
>
>Lee
>
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[time-nuts] Z3812A

[planophore]

I have searched to no avail.

Has anyone a pointer to a real manual for the Z3812A / KS-x devices?

cheers, Graham ve3gtc
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Re: [time-nuts] Z38XX Ulrichs program question How do you restart thegraphs.

[planophore]

Paul,

I don't know for certain but with the limited playing around I have done
with this program, I would start by renaming the data file and then let
the program restart a new file from which I assume the graphs are
plotted.

I forget the file name off hand, might be something .dat or similar. It
is a simple text file.

cheers, Graham ve3gtc


On 12/8/2014, paul swed paulsw...@gmail.com wrote:

Boy I have dug through the program and can not seem to find a way to clear
out the graphs. Tried exports and other things.
Anyone know the secret please?
Thanks
Paul
WB8TSL
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Re: [time-nuts] Lucent KS-24361 RS-422 interface pinout

[planophore]

Good morning Anthony,

Yes, I did see your posting. Thank you for your help.

cheers, Graham ve3gtc


On 12/3/2014, Anthony Roby ar...@antamy.com wrote:

I sent you my posting earlier today, so hopefully you saw it.  The Lucent unit 
seems liberal in its interpretation of the pinouts, but once you've deciphered 
it and got the +ve and -ve pins connected, it works reliably.

Anthony

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Graham
Sent: Tuesday, December 02, 2014 5:36 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Lucent KS-24361 RS-422 interface pinout

Thanks all for answering my question. I looked through old posting but 
obviously didn't stumble upon Anthony's posting otherwise I would have had my 
answer.

I made up a short cable to connect the Startech ICUSB422 to the KS-24361
J8 Diagnostic port and I can now connect. This is the final pinout:

Startech   KS-24361
ICUSB422   J8 - Diagnostic
=
   1  TXD- -- RXD- 8
   2  TXD+ -- RXD+ 4
   3  RXD+ -- TXD+ 5
   4  RXD- -- TXD- 9
   5  GND  --- GND  7
   6  NC
   7  NC
   8  NC
   9  NC

Seems RS-422 is a standard but pinouts vary. Live and learn.

cheers, Graham ve3gtc



On 2014-12-01 21:10, Bob Camp wrote:
 Hi

 If you dig back a month or so, there is a post with all the pinouts on all 
 the connectors.

 4RX+
 8RX-

 5TX+
 6TX-

 3 and 7  ground

 It ??s serial so TX on one goes to RX on the other. + goes to + and - to -  
 The pins are numbered on the connector in *very* small print.

 Bob




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[time-nuts] Lucent KS-24361 24V DC power requirements

[planophore]

Good day all,

I have been following the discussions as best as I could. I recell seeing
the question asked or at least theorized as to what is the power
requirements of these units - either individually or together.

I have reviewed all messages or at least all that I can find in these
threads but I couldn't find a definitive answer unless of course the
answer is in one of the responses hiding where I haven't looked.

I purchased a set of these modules and they are currently in transit but
I don't have a 24V DC supply at the moment.

So, in order to try and get ahead before the arrival of these modules I
would like to at least plan out if not get a suitable power supply
ready. I don't want to over specify by too much and worse yet, under
specify.

Has anyone actually made any power used measurements of these modules? 2A
average, 4A peak? Somewhere inbetween or more?

cheers, Graham ve3gtc
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